- Diodes, are used along Charlieplexing to control the current direction following into the output device. In case of the LEDs, it acts
as a diode for itself so basically it needed a resistance to control the current flowing to it. DC motors are different where for each motor
you need both positive and negative supply on the contrary LEDs need just one input source.

FIGURING OUT HOW TO ADD A DIODE!
-it wasn't easy at all for me Luciano helped me a lot though it, as the motor
will run in both directions unlike with the LED case, so after sketching and
experimenting
-we figured out that for each motor we need to add 2 diodes like the shown
figures. by this we will control the current flowing though the motor in both
directions

-By placing two diodes in the opposite directions around one of the two current suppliers you will control the flow darning in you motor
in one direction coming from one pin at time!

-While experimenting the current supply provided by the ATTINY44 seamed not enough to run one DC motor at the time so we though of increasing
the current in two ways First: is to add P-channel MOSFET along with a pull down resistor ( image1 of the trial is attached) with adding the resistor you
prevent the current from going to ground only when the gate is closed, you will lose a bit of current though but we think the rest is enough to run the motor

Second: is inspired from this link which suggests connecting both PNP and NPN transistors together along with the same pin to the DC motor

we finally decided to test the normal board without any addition and if not we shall add any of the two options, non of the above trials worked out so i gave up!

instead, preparing for my final project i decided to do the normal stepper board using two stepper as an out put from the same board and power
supplied the board with a power jack (watch the video)